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An in-Depth Model-Based Analysis of Decarburization in the AOD Process
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.ORCID iD: 0000-0003-1919-9964
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2012 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 83, no 11, 1039-1052 p.Article in journal (Refereed) Published
Abstract [en]

A previously reported flow and reaction model for an argon-oxygen decarburization converter was extended to also include a thermodynamic description. An in-depth study of the model results has been conducted to answer how concentrations of elements and species in the converter at different locations change with time. This may contribute to the understanding of the mechanisms of the refining procedure in the argon-oxygen decarburization process. The refining procedure includes several step-wise changes of an injected gas composition to higher and higher inert gas ratio, called step changes. A step change leads to a decreased partial pressure of carbon monoxide and maintains the decarburization at a higher efficiency. The results shows early and late concentration profiles for the first injection step and suggests a way to determine when a step change should be made. Moreover, the step change could be determined by calculating the carbon concentration profiles and deciding when the carbon concentration gradients start to diminish.

Place, publisher, year, edition, pages
2012. Vol. 83, no 11, 1039-1052 p.
Keyword [en]
AOD, decarburization, modeling, fluid flow, thermodynamics
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-99278DOI: 10.1002/srin.201200066ISI: 000310600100006Scopus ID: 2-s2.0-84868365981OAI: oai:DiVA.org:kth-99278DiVA: diva2:541757
Note

QC 20121207. Updated from submitted to published.

Available from: 2012-07-23 Created: 2012-07-23 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Coupling of a fundamental mathematical fluid flow model with computational thermodynamics model to study the decarburisation
Open this publication in new window or tab >>Coupling of a fundamental mathematical fluid flow model with computational thermodynamics model to study the decarburisation
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 28 p.
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-96621 (URN)978-91-7501-418-0 (ISBN)
Public defence
2012-06-15, Sal B1, Brinellvägen 23, KTH, Stockholm, 12:00 (English)
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Note
QC 20120607Available from: 2012-06-07 Created: 2012-06-07 Last updated: 2012-07-23Bibliographically approved

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Andersson, Nils Å. I.Tilliander, AndersJonsson, Lage T. I.Jönsson, Pär G.
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